Golden yellow

I saw an article in the paper for how to.... Turns out that white vinegar in addition to sugar makes daffodils last longer. Well I will have to wait and see how long these last, I got them closed on Saturday and they were open by Sunday afternoon, however, I am astonished how enormous they are. The petals seemed almost at full stretch, so il be checking on any other beneficial effects of the vinegar later in the week.